Update duckdb index files

.gitattributes

@@ -62,3 +62,4 @@ default/audiodec_24k_320d/partial-index.duckdb filter=lfs diff=lfs merge=lfs -te
 default/dac_24k/partial-index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/encodec_24k_12bps/partial-index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/encodec_24k_3bps/partial-index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/encodec_24k_6bps/partial-index.duckdb filter=lfs diff=lfs merge=lfs -text

default/encodec_24k_6bps/partial-index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:993d338216db2bd59e6f7293908f58fb81a60564ed5c1b59a99844e90c14617e
+size 3757584384